Lime-kiln cooling attachment



@et 29, 929 C, R, BIRDSEY ,733,857

LIME KILN COOLING ATTACHMENT Filed April 16, 1924 5 Sheets-Sheet 1 Oct. 29, 1929. c. R. BIRDSEY 4 LI-ME KILN COOLING ATTACHMENT Filed April 16, 1924 3 Sheets-Sheet 2 my" W Oct 29, i929. C. R. BIRDSEY m7333557 LIME KILN COOLING ATTACHMENT Filed April 16, 1924 3 sheets-sheet 3 Patented Oct. 29, 1929 UNITED STATES PATENT OFFICE CHARLES R. BIRDSEY, OF HINSDALE, ILLINOIS,'AS SIGNOR TO UNITED STATES GYPSUM COMPANY, F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS LIME-KILN COOLING .ATTACHMENT Application filed April 16, 1924. Serial No. 706,809.

teries of two or more and in certain forms aft# I er burning the contents is discharged u on a floor below the kiln and there allowe to cool before removing. It is an object of this invention to so construct a plurality of kilns that discharge their burned contents upon an inclined supportJ thereunder which automatically spreads the product thereover and from which it is adapted to be easily ,removed to a continuous conveyor for transportation to storage bins or warehouses.

Heretofore .in the type of kiln discharging the burned lime upon the floor under the kiln, the lime so discharged accumulated in a pyramidal pile, the interior of which cooled very slowly unless the pile was manually spread out upon the floor, in which case another handling was necessary to remove the cooled lime to the bin or warehouse. vOne of the advantages of this invention is that the /hot burned lime discharges upon a cooling platform where it rapidly cools without handling and from which it is easily and with little veffort transferred to the conveyor. An-

other advantage is where a plurality of these kilns are arranged iside by side with a common conveyor they can be so operated as to providel a constant uninterrupted flow of cooled lime from the conveyor to the bins or warehouses.

With these and other objects in view, reference is made to the accompanying sheets of drawing which illustrate preferred forms of this device, yet it is to be understood that minor detail changes may be made in the con struction thereof Without departing from the scope of the invention.

In the drawings:

Figure 1 is a fragmentary view in front elevation of a plurality of kilns constructed in accordance with this invention, partly in section.

Figure 2 is a view, similar to Figure 3, of a modified form.

Figure 3 is a view in section taken at vright angles to Figure 1.

In the form of this invention illustrated 1n Figures l and 3 the kilns proper 1 are supported above the floor 2 and each is provided With a discharge opening 3 `in the bottom thereof having' a sliding closure of conventional type whereby the burned lime may be discharged from the kilns, which construction being customary and forming no part of this invention needs no further description.

Arranged below each discharge opening 3 is a cooling platform 4 supported at an angle to the floor and leading from under the discharge openings to adjacent av trench 5 traversing the front of the kilns andl in which is mounted a continuous pan or endless belt conveyor 6.A The angle of the platform 4 to the i floor is arranged at the angle of repose of the lime discharged thereon so that when the contents of the kilns is burned andthe discharge opening 3 is opened the burned lime will upon meeting the inclined cooling platform distribute itself thereover in an even layer. It is preferable to construct the discharge openings 3 oval in shape with the largest dimen` sion extending parallel to the top edge of the platform and it is preferable to provide the platform of greater width than the length of the opening. The cooling platforms may be of plate metal, perforated if desired, or I beams or rails arranged side by side in the direction of the slope of the platform. l

The conveyor trench 5 is preferably covered with a platform 7 having openings 8 in front of and adjacent each cooling platform 4 so that as the burned lime cools an operator may rake the lime from the bottom of the cooling platform and pass it through the opening 8 upon the conveyor 6. It is also preferable to provide an air exhaust duct 9 having an extension 10 leading from over the coolin platform to. cause circulation of air over the eated lime and remove the hot air and fumes arising therefrom. i The form shown in Figure 2 illustrates another form in which the cooling platform 4 is composed of I beams or rails 11 arranged side by side at close intervals but allowing the finer particles to pass therebetween to a chute 12 preferably ofy metal plates, extending under the entire ,cooling platform and 100 from a point'under the upper edge the platform through the side wall of the conveyor trench at a greater slope than the cooling platform so that the fine particles dropping through the platform slide down the chute to the conveyor. It may be desirable to provide the bottom of the chute to extendV over the conveyor 6, as shown in this figure, and in such event the trench platform opening 8 is also provided with a chute 13 directing the line passing therethrough first on to the lower end of the chute 12 and thence to the conveyor.

B this construction it is readily seen that as t e contents of the burned kiln is dischar ed, it will from its own weight spread evenI over the inclined cooling platform and aving large thin surface exposed to the atmosphere will cool much quicker than if dumped in a p ramidal pile, also the cooled lime can be quie y and with but little effort transferred from the platform to the conveyor, thus saving in time and labor.

What I claim is:

1. The combination with an inclined lime kiln discharge platform comprising a plu-3 rality of inclined longitudinally extending rails placed side by side and adjacent to each other but not together so that the smaller charge port, said platform including a series of spaced, parallel rails adapted to permit the spreading and cooling of said burned lime l mit the spreading and `cooling of said burned product and tov permit fines to fall through said rails, an exhaustduct arranged above said platform so as to draw air through said rails and hot product to accomplish the cooling thereof, means for again combining the lines and cooled product, and a conveyor ladapted to continuously remove the mixed cooled product and fines.v Y CHARLES R. BIRDSEY.

particles of burned material will fall there y through, of a chute extending under the platform at a greater inclination than that of the platform to catch the particles that drop through, the lower end of the chute extending beyond and below that of the platform, a conveyor at the bottom of the chute, and a short chute extending from the lower end of the platform to a point above the lower y end of the firstmentioned chute so that material from the platform will fall upon the lower end of the first mentioned chute before being discharged into the conveyor.

2. The combination with-an inclined lime kiln discharge platform comprising a plurality ofinclined ylongitudinal rigid rails laced side by side, of a chute extending lowthe platform at a greater inclination than lthat of the platform for catching the particles of burned material which pass between the rails and fall thereupon, a conveyor adjacent and below the lower end'of the chute, a horizontal platform located at the lower end of the first mentioned platform and having an opening therethrough and a short inclined chute leading therefrom to the other chute and discharging thereupon at a distance above the lower end thereof so that the materials from the horizontal platform .will fall upon the lower end of the first menor the burned product, p 

